Switch-cock for gas-machines.



No. 654,995. Patented July 3|, I900.- N. H. MEDBEBY.

SWITCH COCK FOR GAS MACHINES. (Application filed 1m. 9, 1899.) (No llodel.) 2 sheets sheet l.

Witnesses. I nventor.

Attorney? No. 654,995. Pat'ented Ju ly' 3|, 1900..

N.'H. MEDBERY. I SWITCH/006K FUR GAS MACHINES.

(Application filed Dec. 9, 1899.1

2 Sheets-Sheet 2,

(5.11 in "II" mlllllll Witnesses" fizs nx 852 5;? 4 if Attorneys,

' TATEES iNnLso H. MEDBEBY, or PROVIDENCE, RHODE ISLAND, Assrenon To JACOB s. MARTIN, or EAST GREENWIGH, RHODE ISLAND.

SViVlT QH-COCK oams- ACHINES.

sPEcIrIcArron forming part of Letters ease hi0. 654,995, dated Ji'rl' 31,190 Application filed December 9, 1899. Serial No. 739,789. (No inodel.)

To aZZ whom, it may concern/.- A

Be it known that I, NELSON H. MEDBERY, of Providence, in the county of Providence and State of Rhode Island, have invented certain new and usefullmprovements in Switch- Cocks for Gas-Machines; and I do hereby declare that the following is a full, c'lear,and

exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to the class of cocks and their arrangement for determining the direction of circulation of the fluids in the pipes of gas-machines and the like. It is fully explained and illustrated in this specification and the accompanying drawings.

Figure 1 shows the application of the inven tion to a gas-machine. Fig. 2 is a top view of the switch-cock separate. front elevation of the cock. Fig.4 shows an elevation of the front of the cock, the plug having had a half turn from the position shown in Fig. 3. tion of the shell with the plug in elevation,

taken on line 5 5, Fig, 2, looking to the left.

Fig. 6 is the "same as Fig. 5 looking to the right of line 5 5 in Fig.' 2. Fig. 7 shows in elevation the plug of the cock separate.

The object of this invention is to produce a switch-cock for use in gas-machines that shall simplify the running of them by reducing the number of parts and of the motions necessary to be made in changing the receptacles of material that there may be less liability of forgettingor neglecting any one of them through oversight or ignorance.

The construction and mode of operation are as follows:

A represents the shell of the cock, and O the plug. The shell ,A has two side pipes B B, one on each side. "(See Fig. 2.) On the front there is an upper pipe D turned to the left (see Figs. 2 and 3) and a lower pipe H, which turns down, and the usual taper-hole is made down through the center of the shell A, into which the taper-plug C (seen in Fig. 7) is fitted to turn, with the usual spring a and screw-nut c fitted on its lower end to drawit into the shell and keep it tight as it wears in Fig. 3v shows a.

Fig. 5shows a vertical sec-' use. The plug 0 has two scarfed passages (hit in it, (see Fig. 7,) the upper one of which, I), is made by cutting squarely in on one side near the upper end and then down'obliquely, so as to come out alittle below the middle of the plug on the same side. The lower passage d is made the reverse by cutting squarely in near the lower end on the opposite side of the plug and comingoutalittleabovethemiddleoftheplug; When the plug 0 is put in the shell A with the passage 6 in front, as in Fig. 5, the upper pipe D will communicate through passage 11' with side pipe B, and by turning the cock half around the other side will be as seen in Fig. 6, where the side pipe B communicates through the passage d with the lower pipe H. This position would appear in front, as seen in Fig. 4. Then if the plug 0 isgiven a half turn in the shell the position of the passage 1) and (1 will be as shown by the dotted lines b d in Fig. 3, and the direction the fluid will pass is indicated by the arrows in both Figs. 3 and 4.

InFig. 1 is shown the application of the switch-cock to a gas-machine. The cock is inserted in the pipe connecting the two re ceptacles F and J for holding the material of which the gasis to be made. The receptacles F and G are also connectedby a pipe R, in which the two telltales g and h are inserted.

The operation is as follows 1' The water is supplied by way of the pipe D, with the plug 0 in position as shown in Fig. 3, and will pass through the passage 1) into the pipes B and G to the receptacle F, and the gas made there will pass by the pipe R aroundto and through the receptacle J and pipe G to the pipe B, thence. through the passage d to the outlet H. When the material in receptacle F is exhausted and the water begins to passbeyond it, the telltale 9 will show it. Then the plug G is given a half-turn, which cuts thewater ofi from the pipe B and directs it into theipipe B, as shown in Fig. 7, and through pipe G to receptacle J, and the receptal'clevFis" replaced only one simple moti0n-t-hat of turning the plug a half-turn-necessary to keep the passages all right.

, Having thus described my improvements, I claim as my invention and desire to secure by Letters Patent-'- A switch-cock for gas-machines and the" like, consisting ofa shell having a tapering I hole through it, an outlet on two sides opposite to each other. and aboutniidway of its length,an,upperandaloweroutletonthefront side, in combination with a plug having an upper and a lower passage in it on opposite sides, each passage being out almost directly in near the end and gradually sloping out to I 5 the side a little beyond the middle of the plug, substantially as described.

In testimonywhereof I have hereunto set myhand this 6th dayof December, A D. 1899.

NELSON H. MEDBERY.

I In presen'cerof BENJ. ARNOLD, H. E. BARLOW, 

